Browsing Faculty of Science & Technology (FST) by Title

Now showing items 1588-1607 of 4283

    • Fish habitat suitability and community structure in the equatorial Lake Naivasha, Kenya 

      Oyugi, D. O.; Mavuti, K. M.; Aloo, P. A.; Ojuok, J. E.; Britton, J. R. (2014)
      Habitat suitability indices indicate how fish species respond to different habitat types. We assessed effects of habitat characteristics on fish distribution in an equatorial lake, Lake Naivasha, Kenya, where habitats ...

    • Fish species composition and distribution in Kilifi Creek 

      Sigana, DO; Mavuti, KM; Ruwa, RK (School of Biological Studies, University of NairobiKenya Marine and Fisheries research Institute, Mombasa, 2009)
      Ecological variation along the Kenyan coast influences fisheries composition. Kilifi Creek is a unique ecosystem along this coast because it is an open lagoon. A study of the fisheries fauna of Kilifi Creek was conducted ...

    • .Fishery, Reproductive and Feeding Biology of common octopus Octopus vulgaris Cuvier 1797, on the Kenyan South-coast 

      Kivengea, Gideon (2015-06-19)
      Although common octopus, Octopus vulgaris (Cuvier, 1797), catches are increasing globally, lack of information on the species biology and fishery has been a major concern in its management particularly in Kenya. Currently, ...

    • Fishes of a shallow tropical mangrove estuary, Gazi, Kenya 

      Kimani, E. N; Mwatha, G. K; Wakwabi, E. O; Ntiba, J. M; Okoth, B. K (1996)
      The composition and abundance of teleosts in an estuarine mangrove bay, sampled with a beach seine-net, are described. Site 1, at the mouth of a small river, was fringed by mangroves and had a silty substratum; Site 2 was ...

    • Five-day oscillation in East African low-level jet 

      Ngara, T; Asnani, G C (University of Nairobi, 1978-04)
      EASTERN edges of the continents are favourable for the deflection of tropical easterlies from the winter hemisphere to the summer hemisphere. Low-level southerly jet stream along the East African coast is the most pronounced ...

    • The Five-Factor Model personality assessment for improved student design team performance 

      Ogot, Madara; Okudan, Gül E (2006)
      Researchers have long noted the correlation of various personality traits and team performance. Studies relating aggregate team personality traits to team performance are scattered in the literature and may not always be ...

    • The flatness problem as a natural cosmological phenomenon 

      Maumba, G O; Monyonko, N M; Malo, J O (University of NairobiDepartment of physics, 2008)
      An interplay between elementary particle interactions at very high energies and the expansion of the Universe is studied in the context of the inflationary model to find a possible explanation for an observed flatness ...

    • Flavanols from Tetrapleura tetraptera with cytotoxic activities 

      Ayoolu, Oguntimehin S; Ogbole, Omonike O; Ajaiyeoba, Edith O; Nchiozem-Ngnitedem, Vaderament-A; Demissie, Taye B; Elbadawi, Mohamed; Efferth, Thomas; Bedane, Kibrom G; Spitelle, Michael (University of Nairobi, 2022-05)
      Tetrapleura tetraptera is a medicinal plant used in East and West Africa to treat inflammation and related diseases. From the stem bark of the plant, three previously undescribed flavan-3-ol derivatives named (2R,3S)-3,3 ...

    • Flavone C-glycosides of Phoradendron tomentosum from different host trees 

      Dossaji, SF; Becker, H; Exner, J (Elsevier, 1983)
      Apigenin, three known apigenin C-glycosides, vitexin, schaftoside and isoschaftoside together with apigenin 4′-O-glucoside have been identified in leaves of Phoradendron tomentosum growing on different hosts.

    • Flavones and phenylpropenoids in the surface exudate of Psiadia punctulata 

      Jumaa Benard F.; Yenesew Abiy.; Midiwo Jacob O.; Waterman Peter G. (University of NairobiDepartment of Chemistry, University of Nairobi, 2001-06)
      Three flavones, 5,7-dihydroxy-2′,3′,4′,5′-tetramethoxyflavone, 5,4′-dihydroxy-7,2′,3′,5′-tetramethoxyflavone, and 5,7,4′-trihydroxy-2′,3′,5′ -trimethoxyflavone were isolated from the leaf exudate of Psiadia punctulata, ...

    • Flavonoids and isoflavonoids from Tephrosia fulvinervis and Tephrosia pentaphylla 

      Dagne, Ermias; Yenesew, Abiy; Waterman, Peter G (University of NairobiCollege of Biological and Physical Sciences, 1989)
      From the roots, leaves and pods of Tephrosia pentaphylla three new 6-oxygenated rotenoids (dihydrostemonal, 9-demethyldihydrostemonal and 6-acetoxydihydrostemonal) were isolated and characterized. In addition six known ...

    • Flavonoids and isoflavonoids of Erythrina burttii 

      Martin G. Peter.; Yenesew Abiy.; Heydenreich Matthias.; Guchu Salome M.; lrungu Beatrice.; Derese Solomon.; Midiwo Jacob O. (Department of Chemistry, University of Nairobi,lnstitut fur Chemie, Universitat Potsdam, 2009)
      From the stem bark and root bark of Erythrina burttii twenty-three flavonoids and isoflavonoids, including some eight new compounds, have been isolated and characterised. The stem bark of this plant mainly produces isoflavanones ...

    • Flavonoids and Isoflavonoids with Antiplasmodial Activities from the Root Bark of Erythrina abyssinica 

      Yenesew Abiy.; Derese Solomon.; Irungu Beatrice.; Midiwo Jacob O.; Waters Norman C.; Liyala Pamela.; Akala Hoseah.; Heydenreich Matthias.; Peter Martin G. (University of NairobiDepartment of Chemistry, University of Nairobi, 2003-07)
      From the root bark of Erythrina abyssinica a new pterocarpene [3-hydroxy-9-methoxy-10-(3,3-dimethylallyl)pterocarpene] and a new isoflav-3-ene [7,4′-dihydroxy-2′,5′-dimethoxyisoflav-3-ene] were isolated. In addition, the ...

    • Flavonoids from Tephrosia aequilata 

      Tarus, Paul K.; Machocho, Alex K.; . Lang'at-Thoruwa, Caroline C; . Chhabra, Sumesh C (University of Nairobi, 2002-06)
      From the roots of the plant Tephrosia aequilata Baker, five flavonoids were isolated of which, 3,4:8,9-dimethylenedioxypterocarpan is reported for the first time. Its structure and those of the already known flavonoids ...

    • Flavonoids from Tephrosia interrupta and tephrosia linearis". Fitoterapia, LXI,372 

      Prof.Munavu, Raphael M (University of NairobiCollege of biological and physical science, 1990)

    • Flavonoids from the bark of Erythrina burttii and Erythrina sacleuxii 

      Yenesew, A (University of NairobiDepartment of Chemestry, 1997)

    • Flavonoids from the seed pods of Tephrosia pumila 

      Yenesew, Abiy; Dagne, Ermias; Waterman, Peter G (University of NairobiDepartment of Chemistry, Addis Ababa UniversityPhytochemistry Research Laboratories, Department of Pharmacy (Pharm. Chem.), University of StrathclydeCollege of Biological and Physical Sciences,University of Nairobi, 1989)
      Inaddition to the known pumilaisoflavones A and B two further isoflavonoids have been isolated from the seed pods of Tephrosia pumila collected in Ethiopia. These have been characterized, on the basis of spectral analysis, ...

    • Flavonoids of polygonum senegalense (MEISN) part II: More surface and internal tissue flavonoid aglycones 

      Midiwo, J Ogweno; Gikonyo, NK; Wanjau, DO; Matasi, JJ; Waterman, PG (Department of Chemistry, 1992)

    • Flavonoids of the roots and stem bark of erythrina burttii and erythrina abyssinica 

      Midiwo, J. O.; Derese, S.; Yenesew, A. (Department of Chemistry, University of Nairobi,, 2011)
      The genus Erythrina belongs to the subfamily paplinoideae of the family Leguninosae. This genus is widely distributed in tropical and subtropical regions of the world and is represented by 125-200 species. The presence ...

    • A flavonol glycoside from Myrsine africana leaves 

      Manguro, Lawrence O; Midiwo, Jacob Ogweno; Kraus, Wolfgang (College of Physical and Biological Sciences, 1996)
      Myricetin 3-(3″,4″-diacetylrhamnoside), a novel flavonol glycoside together with myricetin 3-rhamnoside, myricetin 7-rhamnoside, myricetin 3-xyloside, myricetin 3-arabinoside, quercetin 3-galactoside, 3′-O-methylquercetin ...